Donald Trump holds a news conference on March 21, 2016 at his hotel which is under construction in Washington, D.C. (Photo by Mark Peterson/Redux for MSNBC)

Donald Trump’s two big problems

Now comes the hard part for Donald Trump.The country woke up on Wednesday morning to find that, yes, Trump was still the all-but-undisputed nominee of the Republican Party. Now Trump’s supporters and party stalwarts on both sides have to figure out how to spend the long six months before Election Day.Trump faces two daunting challenges right out...